My goal is to only allow cronjobs in our Kubernetes clusters if they have a concurrencyPolicy of Replace. My research showed that ValidatingWebhookConfiguration is probably the solution. However, this is only a guess.

According to the documentation, for example, the following is possible with mutatingWebhook:

For a CREATE pod request, if the field .spec.containers[].resources.limits of a container is not >set, set default resource limits.

I want to do something similar, but I don't know how. Therefore, I hope that someone here can at least give me a tip, source or solution.

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